jumper before you use this technique, you need to consider very thin wires which are used as thin as hair. try the cable is covered by an insulator (I use double-sided tape to wrap the cable to the jumper) to minimize the occurrence of short circuit. try the cable is not too long because in addition to the risk of short circuit, as well as it will provide an increasingly large obstacles. jumper to do this technique, you should check where the broken lines with analog multitester. to determine where to start, you must have a path that can book you buy on HP spare parts shop or bookstore to provide it in accordance with the type of mobile phone.
after checking and making sure that the path is disconnected you can only do the techniques jumper.